package com.rf.HelloSpringBoot.aspect;

import javax.servlet.http.HttpServletRequest;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

/**
 * AOP for HttpRequest
 * @author linzhengchun
 *
 * 2017年7月31日 下午5:56:46
 */
@Aspect
@Component // 注入Spring容器
public class HttpAspect {
	// 采用Spring自带的slf4j，底层为logback。
	private final static Logger logger = LoggerFactory.getLogger(HttpAspect.class);
	
	@Pointcut("execution(public * com.rf.HelloSpringBoot.Controller.VisitorController.*(..))")
	// visitorList(..)中的“..”表示，传入任意参数时都拦截。
	// 如果要拦截所有方法，把visitorList改为*。
	// Pointcut：切点
	public void log() {
		
	}
	
	@Before("log()")
	public void doBefor(JoinPoint joinPoint) {
		ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
		HttpServletRequest request = attributes.getRequest();
		// url
		logger.info("url = {}", request.getRequestURL());
		// method
		logger.info("method = {}", request.getMethod());
		// ip
		logger.info("ip = {}", request.getRemoteAddr());
		// 类方法
		logger.info("class_method = {}", joinPoint.getSignature().getDeclaringTypeName() + "." + joinPoint.getSignature().getName());
		//参数
		logger.info("args = {}", joinPoint.getArgs());
	}
	
	@After("log()")
	public void doAfter() {
		logger.info("后，拦截成功~");
	}
	
	@AfterReturning(returning="object", pointcut = "log()")
	public void doAfterReturning(Object object) {
		logger.info("response = {}", object);
	}
}
